Ecumenical Patriarch Ioannes IV

Ecumenical Patriarch Ioannes IV (538-2 September 595) was the Ecumenical Patriarch of Constantinople from 582 to 595, succeeding Ecumenical Patriarch Eutychios and preceding Ecumenical Patriarch Kyriakos II.

Biography
Ioannes Nesteutes was made the Ecumenical Patriarch of Constantinople in 582 after the death of Ecumenical Patriarch Eutychios. During his reign, there were disputes with the western Catholic church, and these issues lasted until the death of Ioannes in 595.